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Andesta Granitio Irwan
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Journal : PROMINE

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Effect of Porosity on Uniaxial Compressive Strength in Sedimentary Rocks Andesta Granitio Irwan
PROMINE Vol 8 No 2 (2020): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v8i2.2057

Abstract

The rock strength parameter is an important factor used in determining the geotechnical design in determining the stability of the underground slope or mine. One of the rock strength tests in the laboratory (intact rock) is the uniaxial compressive strength test. One of the factors that influence rock strength is the porosity of the rock itself, especially in sedimentary rocks. The rock porosity test is carried out by testing the physical properties of the rock, then a regression analysis is carried out to obtain the correlation of the effect of porosity on rock strength and the correlation between porosity and absorption considered in the analysis. The linear regression results obtained between porosity and saturated water content of rocks showed a positive correlation where the increase in porosity, the saturated water content also increased. The correlation between porosity and uniaxial compressive strength obtained a strong correlation with the power regression model as the best model compared to other regression models because it has the lowest error based on the Root Mean Square Error (RMSE). The final result is obtained by comparing the effect of porosity on rock strength, that is the higher the porosity value have the smaller porosity, so that an increase in rock porosity will reduce the strength of the rock.
Pengaruh Diskontinuitas Terhadap Kestabilan Lereng Batuan Terkekarkan Studi Kasus Kuari Andesit PT Lola Laut Timur Kabupaten Bogor Andesta Granitio Irwan; S. Koesnaryo; Barlian Dwinagara; Singgih Saptono
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2433

Abstract

Diskontinuitas pada suatu massa batuan memberikan pengaruh pada kestabilan suatu lereng batuan karena merupakan salah satu faktor pengendali dari keruntuhan lereng. Dalam penelitian ini dilakukan analisis terhadap peran diskontinuitas yaitu kekar dan intrusi terhadap kestabilan lereng serta pengaruh parameter persisten dan kekasaran kekar terhadap nilai faktor keamanan lereng serta kekuatan massa batuan. Analisis yang digunakan yaitu pengaruh intrusi, persisten serta nilai kekasaran kekar terhadap nilai faktor keamanan lereng. Pengolahan data kestabilan lereng menggunakan Software Rocscience RS2 dengan pemodelan Metode Elemen Hingga dengan pemodelan massa batuan yang digunakan dalam analisis yaitu Model Paralel Deterministik dan Model Veneziano.Hasil penelitian menunjukkan bahwa keberadaan intrusi pada lereng memberikan penurunan nilai faktor keamanan lereng hingga 0,95%. Pengaruh parameter persistensi terhadap faktor keamanan lereng diperoleh bahwa semakin meningkat nilai persistensi maka akan menurunkan nilai faktor keamanan lereng hingga 5,3 – 5,8% dan perubahan nilai JRC menurunkan nilai faktor keamanan hingga 3,2%. Pengaruh persistensi dan kekasaran kekar (JRC) terhadap kekuatan massa batuan diperoleh bahwa adanya peningkatan nilai persistensi akan menurunkan kekuatan massa batuan hingga 1,94% dan penurunan nilai kekasaran kekar akan menurunkan kekuatan massa batuan hingga 1,63%.
Pengaruh Diskontinuitas Terhadap Kestabilan Lereng Batuan Terkekarkan Studi Kasus Kuari Andesit PT Lola Laut Timur Kabupaten Bogor Irwan, Andesta Granitio; Koesnaryo, S.; Dwinagara, Barlian; Saptono, Singgih
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Program Studi Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2433

Abstract

Discontinuity in a rock mass has an influence on the stability of a rock slope because it is one of the controlling factors of slope failure. In this study, an analysis was carried out on the role of discontinuities, namely joints and lithic tuff layers on slope stability and the effect of persistent parameters and joint roughness on the safety factor of safety factor. The analysis used is the effect of changes in the thickness of the lithic tuff, persistence and the value of joint roughness on the value of the safety factor. Processing of slope stability data using Rocscience RS2 Software with Finite Element Method modeling with rock mass modeling used in the analysis, namely the Veneziano Model. The results showed that an increase in the thickness of the lithic tuff layer resulted in a decrease in the safety factor of the slope up to 1.37%. The effect of the persistence parameter on the slope safety factor was found that the higher the persistence value, the lower the slope safety factor value up to 2,9% and changes in the JRC value decreased the safety factor value up to 1,7%.
Co-Authors Aditiawan, Riski Agus Afandi Apriani, Fitri Ari Ardiansyah Ari Wibowo Arif, Maulana Arvi Pramudyantoro ashidiq, abdul rahman Barlian Dwinagara Bayu, Hendi Hendra Dalimunthe, Nurzaidah Putri Danu Mirza Reky Depita Kirana Dewi Astri Eka Muzalfitri Ridwan Fadillah Sabri Fitriana, Fifin Gilfandes, Defa Guskarnali, Guskarnali Ikhlas Makruf Ilpandari Ines Pratiwi Intan Kurnia Irvani Irvani Irvani, Irvani Juliansyah, Ari Koesnaryo, S. Mega Sukma Muhammad Ali Bangsawan Nabil Nabil, Nabil Okta, Evan Dwi Padli Panita, Shakila Priyansah, Sujadi Putra, Tio Sekma S. Koesnaryo Saputra, Dino Singgih Saptono, Singgih Verbi Haryanto Vika Martahayu Wahyudi, Panca Warisa Warisa Wiati, Irene Tresna Winarsih Winarsih Yudistira Bagus Pratama Zainul Arif Rosyadi Zikri Wahyuzi